Slaughter welfare is the final and often most neglected aspect of farm animal welfare. Global standards vary enormously, with significant welfare improvements possible through better regulation and practice.
Slaughter welfare represents the critical final moment when the accumulated welfare history of each animal should end humanely. Effective stunning renders animals insensible and unable to feel pain before killing. Electrical and percussive stunning for poultry and mammals are well-established when properly calibrated and applied. However, failures are common: inadequate electrical current, incorrect placement, stunning reversals before death, and operator error all occur in commercial settings. CO2 stunning for pigs — required by many EU producers — causes documented distress during the induction period when pigs experience hyperventilation and panic before losing consciousness. Nitrogen or argon alternatives may be less aversive but are not widely adopted. Religious exemptions from stunning remain controversial, with animal welfare organizations arguing that alternative stunnings compatible with halal and kosher requirements demonstrate that welfare and religious practice need not conflict. CCTV monitoring in UK abattoirs has produced measurable improvements in compliance.